Intercom



FIG. 1 is a top right, perspective view of an intercom showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a right-side elevation view thereof;

FIG. 4 is a left-side elevation view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The rear of the intercom forms no part of the claimed design. 

CLAIM The ornamental design for an intercom, as shown and described. 